Which statement is not true of greenhouse gases?

The statement that is not true of greenhouse gases is :

 They are produced solely by human activities

Human activities such as: using hairspray, creating pollution, etc are worsened the condition of the greenhouse effect, it exists even before we did those things.

Explanation:

Emissions of gases by humans began to rise dramatically because of the economic Revolution and changes in land use. Several greenhouse gas emitting activities area unit currently essential to the worldwide economy and a elementary a part of trendy life.

Carbon dioxide from the burning of fossil fuels is that the largest single supply of gas emissions from human activities.

Though humans are the main cause of greenhouse effect.

answer; i believe the answer is hydraulic action;